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t B4. Beijing 2008 
APPLICATION OF GEOMATICS IN PHOTOVOLTAICS 
J. Fiescmcari' *, Boris Trstenjak b , D. Setnika c 
a IGC, Slovenia - besenicar.jure@siol.net 
ERC - ENERGETIKA d.o.o., Stanetova 27, Celje, Slovenia - boris.trstenjak@erc-energetika.si 
L Geodetski zavod Celje, d.o.o., Ul. XIV. Divizije 10, Celje, Slovenia - dusan.setnikar@gz-ce.si 
Commission IV/1, WgS 
KEY WORDS: Climate, Environment, Application, GIS, Three-Dimensional System, Solar Energy, Photovoltaic 
ABSTRACT: 
The United Nations climate report discloses that saving the climate is to make greater use of renewable energy resources. On the top 
of this list are photovoltaic systems generating the power from sunlight reliably and without any impact on the environment. To 
optimally exploit these advantages the photovoltaic systems must be properly located and oriented in the environment to meet the 
required specifications (insulation time, area orientation, legislation data, static and/or dynamic power network etc.). To 
economically justify the use of the photovoltaic systems the geomatic was applied in the decision making process. Slovenia has in 
last 15 years systematically built up the system of national geoinformation infrastructure which is widely used in governmental and 
private sector for different thematic and project oriented applications. This contribution would like to show the application of the 
standard national geomatic infrastructure data base in the photovoltaic domain. The use of the data bases such as insulation, digital 
elevation model, digital orthophoto, land cadastre and land register, cadastre of buildings, cadastre of public infrastructure facilities 
and environmental spatial protection plans is described in detail indicating their role in the optimization process. The entire process 
is supported with practical examples including the technical and economical components. 
1. PREFACE 
1.1 Solar energy 
The solar illumination radiation of Slovenia was elaborated by 
the quasi-global radiation model. Solar energy depends on the 
incidence angle (astronomical and terrain conditions) and on the 
duration of solar radiation. The annual global and quasi-global 
radiation energy was calculated as the sum of all energies over 
all decades. (Figure 1) 
Figure 1. Energy of annual global radiation in Slovenia 
1.2 Photovoltaics 
Photovoltaics is a solar power technology that uses solar cells 
or solar photovoltaic arrays to convert sunlight directly into 
electricity. Photovoltaics is also the field of study relating to 
this technology and there are many organizations devoted to 
work on photovoltaics. The manufacture of photovoltaic cells 
has expanded dramatically in recent years. Mostly the 
installations are grid-tied, ground-mounted or building- 
integrated. (Figure 2) 
Figure 2. Ground-mounted and building-integrated photo 
voltaic arrays 
1.3 Geomatics infrastructure 
In last 15 Years Slovenia has build up numerous 
geoinformation infrastructure databases ranging from property 
registers, technical infrastructure databases and various registers 
to support the management of the real estates. The entire geo 
infrastructure follows international standards and is 
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